A diastereodivergent strategy for the asymmetric syntheses of (−)-martinellic acid and (−)-4-epi-martinellic acid
作者:Stephen G. Davies、Ai M. Fletcher、James A. Lee、Thomas J.A. Lorkin、Paul M. Roberts、James E. Thomson
DOI:10.1016/j.tet.2013.09.013
日期:2013.11
Asymmetric syntheses of (−)-martinellic acid and (−)-4-epi-martinellic acid were achieved in 20 steps from commercially available starting materials using a diastereodivergent strategy. The conjugateaddition of lithium (R)-N-allyl-N-(α-methyl-p-methoxybenzyl)amide to tert-butyl (E)-3-[2′-(N,N-diallylamino)-5′-bromophenyl]propenoate and alkylation of the resultant β-amino ester with methyl bromoacetate